Revision of IPCC Default PFC Emission Factors

Czerniak, Michael
(Edwards and IPCC)

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The IPCC (the United Nations’ Intergovernmental Panel on Climate Change) published standard default values for the emissions of greenhouse gases (GHGs) in 2006 (2006 IPCC Guidelines for National Greenhouse Gas Inventories, http://www.ipcc-nggip.iges.or.jp/public/2006gl/) for a comprehensive spectrum of sources, ranging from agricultural to industrial sectors. At the 26th Meeting of Task Force Bureau (TFB) (28 – 29 August 2014, Ottawa) it was concluded that to maintain the scientific validity of the 2006 IPCC Guidelines, certain refinements may be required, taking into account scientific and other technical advances that have matured sufficiently since 2006. For instance wetlands emit more methane than previously assumed, and aluminium smelting may emit PFC gases during times between anode events. With this in mind, a task force (Task Force on National Greenhouse Gas Inventories, TFI) has been established to review all available data with a view to publishing a new document in 2019. The new report will be an update to the 2006 document – and specifically NOT a fundamentally new document – and only where significant new data has come to light will changes be made. A scoping meeting was held in Wollongong in April 2016 and Table of Contents follow-up in Minsk in August, with nominations for authors made by the end of 2016. 2017 is the year of data collection, 2018 is report writing, and 2019 is UN approval (IPCC49) and publication. Four areas are being considered: Unidentified sources of perfluorocarbons (PFCs), Emissions from soils, Land representation and Emissions from flooded land. Of particular interest to the semiconductor industry will be consideration of the differences between the 2006 IPCC emission factors and the more recent EPA factors and other potential PFC emission sources, such as the manufacture of the PFC gases themselves. The presentation will elaborate on these topics and provide an opportunity for questions and comments.

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